HP Printers - Which OS X Version Is on My Computer?
This document is for all Mac OS X versions.
Learn how to find the Mac OS X version and build number on your computer. This information is helpful when you update the software or the operating system.
Finding your Mac OS X version number
To find the Mac OS X version number, click the Apple icon, and then click About This Mac.
The About This Mac window opens, and displays the OS X version number.
Figure : An example of the Mac OS X version number displayed in the About This Mac window
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